Krupp produced the turrets for both Henschel and Porsche so there is no reason to suspect that there were any differences in layout.
Given that Porsche lost the contractual race so to speak, the turrets initially intended for Porsche were instead given over to Henschel.
Only one Porsche Tiger saw combat before it was destroyed after surviving more than a year on the Eastern Front.
As there are no surviving plans of the Tiger P - one can only treat the interior of the kit as a what if but that should not stop anyone building this or any other Tiger P given that the interior is hardly pivotal in telling a story